src/com/android/retaildemo/DemoPlayer.java - platform/packages/apps/RetailDemo - Git at Google

 /*
  * Copyright (C) 2016 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.retaildemo;

 import android.app.Activity;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.media.MediaPlayer;
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.PowerManager;
 import android.os.SystemClock;
 import android.os.UserManager;
 import android.text.TextUtils;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.VideoView;

 import java.io.File;

 /**
  * This is the activity for playing the retail demo video. This will also try to keep
  * the screen on.
  *
  * This will check for the demo video in {@link Environment#getDataPreloadsDemoDirectory()} or
  * {@link Context#getObbDir()}. If the demo video is not present, it will run a task to download it
  * from the specified url.
  */
 public class DemoPlayer extends Activity implements DownloadVideoTask.ResultListener {

     private static final String TAG = "DemoPlayer";
     private static final boolean DEBUG = false;

     private static final String VIDEO_FILE_NAME = "retail_demo.mp4";
     static final String PRELOADED_VIDEO_FILE = Environment.getDataPreloadsDemoDirectory()
             + File.separator + VIDEO_FILE_NAME;

     /**
      * We save the real elapsed time to serve as an indication for downloading the demo video
      * for the next device boot. The device could boot fast at times and could result in
      * skipping the download during the next boot sessions. To be safe from cases like this, we
      * add this offset to the real elapsed time.
      */
     private static final long REAL_ELAPSED_TIME_OFFSET_MS = 60 * 1000; // 1 min

     private PowerManager mPowerManager;

     private VideoView mVideoView;
     private String mDownloadPath;
     private boolean mUsingDownloadedVideo;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         // Keep screen on
         getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
                 | WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
                 | WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
         setContentView(R.layout.retail_video);

         mPowerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);

         mDownloadPath = getObbDir().getPath() + File.separator + VIDEO_FILE_NAME;
         mVideoView = (VideoView) findViewById(R.id.video_content);

         // Start playing the video when it is ready
         mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
             @Override
             public void onPrepared(MediaPlayer mediaPlayer) {
                 mediaPlayer.setLooping(true);
                 mVideoView.start();
             }
         });

         mVideoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
             @Override
             public boolean onError(MediaPlayer mp, int what, int extra) {
                 if (mUsingDownloadedVideo && new File(PRELOADED_VIDEO_FILE).exists()) {
                     if (DEBUG) Log.d(TAG, "Error using the downloaded video, "
                             + "falling back to the preloaded video at " + PRELOADED_VIDEO_FILE);
                     mUsingDownloadedVideo = false;
                     setVideoPath(PRELOADED_VIDEO_FILE);
                     // And delete the downloaded video so that we don't try to use it
                     // again next time.
                     new File(mDownloadPath).delete();
                 } else {
                     displayFallbackView();
                 }
                 return true;
             }
         });

         loadVideo();
     }

     private void displayFallbackView() {
         if (DEBUG) Log.d(TAG, "Showing the fallback view");
         findViewById(R.id.fallback_layout).setVisibility(View.VISIBLE);
         findViewById(R.id.video_layout).setVisibility(View.GONE);
     }

     private void displayVideoView() {
         if (DEBUG) Log.d(TAG, "Showing the video view");
         findViewById(R.id.video_layout).setVisibility(View.VISIBLE);
         findViewById(R.id.fallback_layout).setVisibility(View.GONE);
     }

     private void loadVideo() {
         // If the video is already downloaded, then use that and check for an update.
         // Otherwise check if the video is preloaded, if not download the video from the
         // specified url.
         boolean isVideoSet = false;
         if (new File(mDownloadPath).exists()) {
             if (DEBUG) Log.d(TAG, "Using the already existing video at " + mDownloadPath);
             setVideoPath(mDownloadPath);
             isVideoSet = true;
         } else if (new File(PRELOADED_VIDEO_FILE).exists()) {
             if (DEBUG) Log.d(TAG, "Using the preloaded video at " + PRELOADED_VIDEO_FILE);
             setVideoPath(PRELOADED_VIDEO_FILE);
             isVideoSet = true;
         }

         final String downloadUrl = getString(R.string.retail_demo_video_download_url);
         // If the download url is empty, then no need to start the download task.
         if (TextUtils.isEmpty(downloadUrl)) {
             if (!isVideoSet) {
                 displayFallbackView();
             }
             return;
         }
         if (!checkIfDownloadingAllowed()) {
             if (DEBUG) Log.d(TAG, "Downloading not allowed, neither starting download nor checking"
                     + " for an update.");
             if (!isVideoSet) {
                 displayFallbackView();
             }
             return;
         }
         new DownloadVideoTask(this, mDownloadPath, this).run();
     }

     private boolean checkIfDownloadingAllowed() {
         final long lastRealElapsedTime = DataReaderWriter.getElapsedRealTime(this);
         final long realElapsedTime = SystemClock.elapsedRealtime();
         // We need to download the video atmost once after every boot.
         if (lastRealElapsedTime == 0 || realElapsedTime < lastRealElapsedTime) {
             DataReaderWriter.setElapsedRealTime(this,
                     realElapsedTime + REAL_ELAPSED_TIME_OFFSET_MS);
             return true;
         }
         return false;
     }

     @Override
     public void onFileDownloaded(final String filePath) {
         mUsingDownloadedVideo = true;
         runOnUiThread(new Runnable() {
             @Override
             public void run() {
                 setVideoPath(filePath);
             }
         });
     }

     @Override
     public void onError() {
         displayFallbackView();
     }

     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
         if (getSystemService(UserManager.class).isDemoUser()) {
             disableSelf();
         }
         return true;
     }

     private void disableSelf() {
         final String componentName = getString(R.string.demo_overlay_app_component);
         if (!TextUtils.isEmpty(componentName)) {
             ComponentName component = ComponentName.unflattenFromString(componentName);
             if (component != null) {
                 Intent intent = new Intent();
                 intent.setComponent(component);
                 ResolveInfo resolveInfo = getPackageManager().resolveService(intent, 0);
                 if (resolveInfo != null) {
                     startService(intent);
                 } else {
                     resolveInfo = getPackageManager().resolveActivity(intent,
                             PackageManager.MATCH_DEFAULT_ONLY);
                     if (resolveInfo != null) {
                         startActivity(intent);
                     } else {
                         Log.w(TAG, "Component " + componentName + " cannot be resolved");
                     }
                 }
             }
         }
         getPackageManager().setComponentEnabledSetting(getComponentName(),
                 PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 0);
     }

     @Override
     public void onPause() {
         if (mVideoView != null) {
             mVideoView.pause();
         }
         // If power key is pressed to turn screen off, turn screen back on
         if (!mPowerManager.isInteractive()) {
             forceTurnOnScreen();
         }
         super.onPause();
     }

     @Override
     public void onResume() {
         super.onResume();
         // Resume video playing
         if (mVideoView != null) {
             mVideoView.start();
         }
     }

     @Override
     public void onWindowFocusChanged(boolean hasFocus) {
         if (hasFocus) {
             // Make view fullscreen.
             // And since flags SYSTEM_UI_FLAG_HIDE_NAVIGATION and SYSTEM_UI_FLAG_HIDE_NAVIGATION
             // might get cleared on user interaction, we do this here.
             getWindow().getDecorView().setSystemUiVisibility(
                     View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                             | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
                             | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
                             | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
                             | View.SYSTEM_UI_FLAG_FULLSCREEN
                             | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                             | View.STATUS_BAR_DISABLE_BACK);
         }
     }

     private void setVideoPath(String videoPath) {
         // Load the video from resource
         try {
             mVideoView.setVideoPath(videoPath);
             displayVideoView();
         } catch (Exception e) {
             Log.e(TAG, "Exception setting video uri! " + e.getMessage());
             displayFallbackView();
         }
     }

     private void forceTurnOnScreen() {
         final PowerManager.WakeLock wakeLock = mPowerManager.newWakeLock(
                 PowerManager.FULL_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, TAG);
         wakeLock.acquire();
         // Device woken up, release the wake-lock
         wakeLock.release();
     }
 }
	/*
	* Copyright (C) 2016 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.retaildemo;

	import android.app.Activity;
	import android.content.ComponentName;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.media.MediaPlayer;
	import android.os.Bundle;
	import android.os.Environment;
	import android.os.PowerManager;
	import android.os.SystemClock;
	import android.os.UserManager;
	import android.text.TextUtils;
	import android.util.Log;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.WindowManager;
	import android.widget.VideoView;

	import java.io.File;

	/**
	* This is the activity for playing the retail demo video. This will also try to keep
	* the screen on.
	*
	* This will check for the demo video in {@link Environment#getDataPreloadsDemoDirectory()} or
	* {@link Context#getObbDir()}. If the demo video is not present, it will run a task to download it
	* from the specified url.
	*/
	public class DemoPlayer extends Activity implements DownloadVideoTask.ResultListener {

	private static final String TAG = "DemoPlayer";
	private static final boolean DEBUG = false;

	private static final String VIDEO_FILE_NAME = "retail_demo.mp4";
	static final String PRELOADED_VIDEO_FILE = Environment.getDataPreloadsDemoDirectory()
	+ File.separator + VIDEO_FILE_NAME;

	/**
	* We save the real elapsed time to serve as an indication for downloading the demo video
	* for the next device boot. The device could boot fast at times and could result in
	* skipping the download during the next boot sessions. To be safe from cases like this, we
	* add this offset to the real elapsed time.
	*/
	private static final long REAL_ELAPSED_TIME_OFFSET_MS = 60 * 1000; // 1 min

	private PowerManager mPowerManager;

	private VideoView mVideoView;
	private String mDownloadPath;
	private boolean mUsingDownloadedVideo;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	// Keep screen on
	getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
	\| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED
	\| WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD);
	setContentView(R.layout.retail_video);

	mPowerManager = (PowerManager) getSystemService(Context.POWER_SERVICE);

	mDownloadPath = getObbDir().getPath() + File.separator + VIDEO_FILE_NAME;
	mVideoView = (VideoView) findViewById(R.id.video_content);

	// Start playing the video when it is ready
	mVideoView.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
	@Override
	public void onPrepared(MediaPlayer mediaPlayer) {
	mediaPlayer.setLooping(true);
	mVideoView.start();
	}
	});

	mVideoView.setOnErrorListener(new MediaPlayer.OnErrorListener() {
	@Override
	public boolean onError(MediaPlayer mp, int what, int extra) {
	if (mUsingDownloadedVideo && new File(PRELOADED_VIDEO_FILE).exists()) {
	if (DEBUG) Log.d(TAG, "Error using the downloaded video, "
	+ "falling back to the preloaded video at " + PRELOADED_VIDEO_FILE);
	mUsingDownloadedVideo = false;
	setVideoPath(PRELOADED_VIDEO_FILE);
	// And delete the downloaded video so that we don't try to use it
	// again next time.
	new File(mDownloadPath).delete();
	} else {
	displayFallbackView();
	}
	return true;
	}
	});

	loadVideo();
	}

	private void displayFallbackView() {
	if (DEBUG) Log.d(TAG, "Showing the fallback view");
	findViewById(R.id.fallback_layout).setVisibility(View.VISIBLE);
	findViewById(R.id.video_layout).setVisibility(View.GONE);
	}

	private void displayVideoView() {
	if (DEBUG) Log.d(TAG, "Showing the video view");
	findViewById(R.id.video_layout).setVisibility(View.VISIBLE);
	findViewById(R.id.fallback_layout).setVisibility(View.GONE);
	}

	private void loadVideo() {
	// If the video is already downloaded, then use that and check for an update.
	// Otherwise check if the video is preloaded, if not download the video from the
	// specified url.
	boolean isVideoSet = false;
	if (new File(mDownloadPath).exists()) {
	if (DEBUG) Log.d(TAG, "Using the already existing video at " + mDownloadPath);
	setVideoPath(mDownloadPath);
	isVideoSet = true;
	} else if (new File(PRELOADED_VIDEO_FILE).exists()) {
	if (DEBUG) Log.d(TAG, "Using the preloaded video at " + PRELOADED_VIDEO_FILE);
	setVideoPath(PRELOADED_VIDEO_FILE);
	isVideoSet = true;
	}

	final String downloadUrl = getString(R.string.retail_demo_video_download_url);
	// If the download url is empty, then no need to start the download task.
	if (TextUtils.isEmpty(downloadUrl)) {
	if (!isVideoSet) {
	displayFallbackView();
	}
	return;
	}
	if (!checkIfDownloadingAllowed()) {
	if (DEBUG) Log.d(TAG, "Downloading not allowed, neither starting download nor checking"
	+ " for an update.");
	if (!isVideoSet) {
	displayFallbackView();
	}
	return;
	}
	new DownloadVideoTask(this, mDownloadPath, this).run();
	}

	private boolean checkIfDownloadingAllowed() {
	final long lastRealElapsedTime = DataReaderWriter.getElapsedRealTime(this);
	final long realElapsedTime = SystemClock.elapsedRealtime();
	// We need to download the video atmost once after every boot.
	if (lastRealElapsedTime == 0 \|\| realElapsedTime < lastRealElapsedTime) {
	DataReaderWriter.setElapsedRealTime(this,
	realElapsedTime + REAL_ELAPSED_TIME_OFFSET_MS);
	return true;
	}
	return false;
	}

	@Override
	public void onFileDownloaded(final String filePath) {
	mUsingDownloadedVideo = true;
	runOnUiThread(new Runnable() {
	@Override
	public void run() {
	setVideoPath(filePath);
	}
	});
	}

	@Override
	public void onError() {
	displayFallbackView();
	}

	@Override
	public boolean dispatchTouchEvent(MotionEvent ev) {
	if (getSystemService(UserManager.class).isDemoUser()) {
	disableSelf();
	}
	return true;
	}

	private void disableSelf() {
	final String componentName = getString(R.string.demo_overlay_app_component);
	if (!TextUtils.isEmpty(componentName)) {
	ComponentName component = ComponentName.unflattenFromString(componentName);
	if (component != null) {
	Intent intent = new Intent();
	intent.setComponent(component);
	ResolveInfo resolveInfo = getPackageManager().resolveService(intent, 0);
	if (resolveInfo != null) {
	startService(intent);
	} else {
	resolveInfo = getPackageManager().resolveActivity(intent,
	PackageManager.MATCH_DEFAULT_ONLY);
	if (resolveInfo != null) {
	startActivity(intent);
	} else {
	Log.w(TAG, "Component " + componentName + " cannot be resolved");
	}
	}
	}
	}
	getPackageManager().setComponentEnabledSetting(getComponentName(),
	PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 0);
	}

	@Override
	public void onPause() {
	if (mVideoView != null) {
	mVideoView.pause();
	}
	// If power key is pressed to turn screen off, turn screen back on
	if (!mPowerManager.isInteractive()) {
	forceTurnOnScreen();
	}
	super.onPause();
	}

	@Override
	public void onResume() {
	super.onResume();
	// Resume video playing
	if (mVideoView != null) {
	mVideoView.start();
	}
	}

	@Override
	public void onWindowFocusChanged(boolean hasFocus) {
	if (hasFocus) {
	// Make view fullscreen.
	// And since flags SYSTEM_UI_FLAG_HIDE_NAVIGATION and SYSTEM_UI_FLAG_HIDE_NAVIGATION
	// might get cleared on user interaction, we do this here.
	getWindow().getDecorView().setSystemUiVisibility(
	View.SYSTEM_UI_FLAG_LAYOUT_STABLE
	\| View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
	\| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
	\| View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
	\| View.SYSTEM_UI_FLAG_FULLSCREEN
	\| View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
	\| View.STATUS_BAR_DISABLE_BACK);
	}
	}

	private void setVideoPath(String videoPath) {
	// Load the video from resource
	try {
	mVideoView.setVideoPath(videoPath);
	displayVideoView();
	} catch (Exception e) {
	Log.e(TAG, "Exception setting video uri! " + e.getMessage());
	displayFallbackView();
	}
	}

	private void forceTurnOnScreen() {
	final PowerManager.WakeLock wakeLock = mPowerManager.newWakeLock(
	PowerManager.FULL_WAKE_LOCK \| PowerManager.ACQUIRE_CAUSES_WAKEUP, TAG);
	wakeLock.acquire();
	// Device woken up, release the wake-lock
	wakeLock.release();
	}
	}